So I'm trying out this new mac and the fps slows when I watch through. I have a few objects blurred and a couple of tweens. I know flash will compensate by slowing down the fps, but it seems like the computer should be able to handle more. I was making a test animation of Icarus and I noticed it going a bit slow.

When you're testing playing by pressing the Enter key, Flash is having to update all of the panel, especially the timeline. That's unlikely to run at full speed, especially if the stage is zoomed in at all. You can improve the performance by going to View/Preview Mode, and choosing a faster setting. Or, do a Test Movie instead.

Another option is to include a Stream audio layer in the timeline, then everything will keep up with real time, by skipping frames if need be.